"You obtained the explosives, so you thought, having paid for the device using crypto-currency and arranged for its delivery to an address away from your own home."

Tim Gregory from the NCA said: "The explosive device Randhawa sought to purchase online had the potential to cause serious damage and kill many people if he had been successful in using it.

"He was not involved in an organised crime group or linked to terrorism, but his actions show he is someone who poses a significant risk to the community.

"Identifying people like Randhawa - who seek to access illegal firearms and weapons - is a priority for the NCA and we will not stop in our efforts to make sure they are arrested and held accountable for their actions."